The Major Gods, the god of wind, fire, earth, and water, declare war upon one another and struggle for control over the world, claiming vast swaths of land as their domains. In their warring with one another, the Major Gods cause mass destruction across their battlefields, and many are killed and replaced during the conflicts.
Lapi, The God of Earth and the Fire God move the continents, crashing them together to make their own travel easier and block access to some of the oceans from Nagi, God of Water, meanwhile Nagi and the God of Wind creat devastating storms and permanently change weather patterns across the globe. The gods' actions cause many extinctions in their wake, permanently scarring the world.
In 5892, the Yellowstone Supervolcano erupts, thought by most to be directly caused by Fire God Vega and Lapi warring over the location, both having claimed it as their own, causing the War of Black Ash.
The conflict ended due to direct intervention of Shia, the God of Death, and Mora, The God of Life, coming to an agreement that if the war continued, all life in the world may be destroyed. The Majors were threatened that if they did not come to peace, the gods of life and death would slay all of them, and never again have Major Gods.